This professional culling system is a first-of-its-kind, two-stage system that allows you to cull by color and weight. A series of six highly buoyant, impact-resistant balls eliminates the need for markers, charts or computers. The easy-to-read numbers record up to 15 pounds, 15 ounces. Setting weight on each ball is quick and simple. No more reweighing, extra-handling or extra stress on fish. Thanks to SmartCull, it's never been easier to make sure you're keeping the best, and getting rid of the rest.